The Iron K-shell features of MXB 1728-34 from a Simultaneous Chandra-RXTE Observation
Abstract
We report on a simultaneous Chandra and RossiXTE observation of the low-mass X-ray binary atoll bursting source MXB 1728-34 performed on 2002 March 3-5. We fit the 1.2-35 keV continuum spectrum with a blackbody plus a Comptonized component. Large residuals at 6-10 keV can be fitted by a broad (FWHM ~ 2 keV) Gaussian emission line or, alternatively, by two absorption edges associated with lowly ionized iron and Fe XXV/XXVI at ~7.1 keV and ~9 keV, respectively. In this interpretation, we find no evidence of broad, or narrow, emission lines between 6 and 7 keV. We test our alternative modelling of the iron K shell region by reanalysing a previous BeppoSAX observation of MXB 1728-34, finding a general agreement with our new spectral model.
Cite
@article{arxiv.astro-ph/0511072,
title = {The Iron K-shell features of MXB 1728-34 from a Simultaneous Chandra-RXTE Observation},
author = {A. D' Ai and T. Di Salvo and R. Iaria and M. Mendez and L. Burderi and G. Lavagetto and W. H. G. Lewin and N. R. Robba and L. Stella and M. van der Klis},
journal= {arXiv preprint arXiv:astro-ph/0511072},
year = {2007}
}
Comments
6 pages, 4 figures. Accepted for publication by A&A